Hey you are of course entitled to your opinion. No one can tell you how to feel about things. I personally don't feel that way at all. I've not heard a single thing from him which indicates to me that he Has turned his back on the fans and team that supported and defended him. The "worst" I've seen is him complaining about NE weather and saying he prefers Florida weather, which, frankly I don't blame anyone for at all who feels that way. Every time I've heard him talk about his time with the Patriots, it has been with more respect and appreciation than I've ever seen a player express about a former team. I haven't seen a single negative thing said about anyone in or around the building from him.
As far as the Gronk situation, he didn't tell Gronk to retire, Gronk did that all on his own. However he did so because (according to him) Belichick was trying to trade him to the Lions (making him the 3rd HOF player I'm aware of who would rather not play football than play for the Lions). From there, it was a matter of getting the trade which Belichick wanted to occur to happen to a team he actually wanted to play for. Brady's contract was not renewed by the Patriots and to hear some (TyLaw for example) say it that's because Belichick wanted him gone. So I don't blame him for moving on, it was time for both parties, and I don't blame him for wanting to play with Gronk wherever he ended up.
As such, I feel pretty much the opposite. Still a fan of his, still wishing for him to have success, even though I'm mostly just wishing he would retire already. No ill will whatsoever towards him or Gronk, and I'm hopeful they'll retire as Patriots and get into both the Pats HOF and Canton, it was a joy to watch them play and thanks to them we got more success than any other team has ever seen, so to me they'll forever be Patriots. Most of the board lies somewhere between our views I know, but closer to yours than mine, so I highly doubt you'll get called names, and if you do, it'll reflect more on the person doing it than general sentiment.